After age 30, a woman's fertility decreases every year. The number and quality of her eggs goes down until she reaches menopause. Menopause usually happens around age 45 to 55. During that time, women stop having their periods and are no longer fertile.
By age 30, fertility (the ability to get pregnant) starts to decline. This decline happens faster once you reach your mid-30s. By 45, fertility has declined so much that getting pregnant naturally is unlikely.
Pregnancy in Your 40s
If you get pregnant after 35 years old, experts call this an “advanced maternal age” pregnancy. But it's still possible to get pregnant and deliver a healthy baby in your 40s. Childbirth at older ages has become more common too. Since the 1990s, birth rates in people aged 40-44 have gone up.
Geriatric pregnancy is a rarely used term for having a baby when you're 35 or older. Rest assured, most healthy women who get pregnant after age 35 and even into their 40s have healthy babies.
Women who become pregnant in their 30s and early 40s can have safe, healthy pregnancies, says Ellie Ragsdale, MD, director of fetal intervention at UH Cleveland Medical Center. But they do face a higher risk of some problems.
A pregnancy that begins after age 35 is classified as a high-risk pregnancy because the risk of complications is higher, not inevitable. Many of the problems that occur with pregnancies after age 35 are related to health conditions that occur more often as you age.
After age 35, there's a higher risk of pregnancy-related complications that might lead to a C-section delivery. The risk of chromosomal conditions is higher.
While delivering at age 35 and older is officially considered “advanced maternal age,” Dr. Kalish notes that in reality, there's no “magic number” for being at-risk for complications. “A healthy 38-year-old could have an easier pregnancy than a 20-year-old who has multiple medical issues,” Dr.
If you are thinking about having a baby in your late thirties or early forties, you are not alone. Women ages 35-45 are increasingly becoming first-time moms. And most healthy women in this age group have healthy pregnancies, births and babies.
There's no expiration date on when guys can father a child. Case in point: Rocker Mick Jagger just had his eighth child at the age of 73. Since men don't hit menopause—the time in a woman's life where her fertility ends—they can typically continue to father children into their later years.
While a 92-year-old woman delivering a 60-year-old baby may sound like a bizarre plot twist from the movie “Benjamin Button,” it's true. Huang Yijun, 92, of southern China, recently delivered a child which she'd been carrying for well over half a century. The baby wasn't alive, however.
As you get closer to 40, it's biologically more difficult to get pregnant and you may have a higher risk of miscarriage, chromosomal issues, and other pregnancy complications. But most women in their 30s will get pregnant with little trouble.
Peak male fertility is around 25-29 years old. Sperm quality begins to decline at 30. At 45, men begin to experience a significant decrease in semen volume. Older men can also take longer to conceive a child.
Male fertility generally starts to reduce around age 40 to 45 years when sperm quality decreases. Increasing male age reduces the overall chances of pregnancy and increases time to pregnancy (the number of menstrual cycles it takes to become pregnant) and the risk of miscarriage and fetal death.
Having Babies After 35 Is Safe
And while it's true that conceiving after 35 comes with an increased risk of complications—like preeclampsia, gestational diabetes, chromosomal abnormalities, and even miscarriage or stillbirth—many people go on to deliver healthy babies.
The U.S. National Birth Defects Prevention Study found that women greater than age 40 are at increased risk of having babies with multiple types of heart defects, genital abnormalities, skull deformities, and esophageal malformations.
Definition of geriatric pregnancy
We define advanced maternal age (formerly geriatric pregnancy) as those who are 35 years or older at their estimated delivery date.
If you're under 35 and in good health, it's perfectly natural for it to take up to a year. It can take longer if you are older, however; for women aged 38, 67% who have regular unprotected sexual intercourse will only get pregnant after two years of trying2.
Down syndrome occurs in people of all races and economic levels. The risk increases with the mother's age (1 in 1250 for a 25 year old mother to 1 in 1000 at age 31, 1 in 400 at age 35, and about 1 in 100 at age 40). However, 80% of babies with Down syndrome are born to women under age 35 years.
“So, every patient is different and every case is unique. However, from the current medical evidence, most medical authorities do state that if multiple C-sections are planned, the expert recommendation is to adhere to the maximum number of three.”
Your Chances of Getting Pregnant: Early 30s (30 to 34)
Your odds of conceiving are still high—up to an 86% success rate for couples that try for a full year. The only major change is that your chances of miscarriage by age 30 have risen to 20%.
A reassuring study found that women ages 30-34 have an 86% chance of getting pregnant within one year of trying, and a 94% chance of conceiving after two years. For women ages 35-39, there's an 82% chance of conceiving after one year, and a 90% chance of conceiving after two years.
In a new study, Anqi Chen and Nilufer Gok at the Center for Retirement Research predicted that the final fertility rate for Millennials in their 30s – the rate at the end of their childbearing years – will average 1.96 children.